refactor: IDE0007 Use var instead of explicit type

[JamieMagee]

IDE0007: Use var instead of explicit type

Related to #340

[codecov-commenter]

Codecov Report

Merging #405 (1eb8555) into main (4c9ec94) will not change coverage.
The diff coverage is 79.87%.

@@           Coverage Diff           @@
##             main     #405   +/-   ##
=======================================
  Coverage   69.01%   69.01%           
=======================================
  Files         242      242           
  Lines        7772     7772           
=======================================
  Hits         5364     5364           
  Misses       2408     2408           

Files	Coverage Δ
...Adapters/ComponentDetectionToSBOMPackageAdapter.cs	80.00% <100.00%> (ø)
...crosoft.Sbom.Api/Config/ApiConfigurationBuilder.cs	74.79% <100.00%> (ø)
src/Microsoft.Sbom.Api/Config/ConfigFileParser.cs	81.81% <100.00%> (ø)
src/Microsoft.Sbom.Api/Config/ConfigSanitizer.cs	76.66% <100.00%> (ø)
...soft.Sbom.Api/Config/Validators/ConfigValidator.cs	75.55% <100.00%> (ø)
...ft.Sbom.Api/Config/Validators/IntRangeValidator.cs	83.33% <100.00%> (ø)
...rters/ComponentToExternalReferenceInfoConverter.cs	95.91% <100.00%> (ø)
...Converters/ExternalReferenceInfoToPathConverter.cs	80.85% <100.00%> (ø)
...om.Api/Converters/SbomToolManifestPathConverter.cs	88.00% <100.00%> (ø)
...icrosoft.Sbom.Api/Entities/FileValidationResult.cs	100.00% <100.00%> (ø)
... and 50 more